AC Magnetic Motor Controls |
Type 4010 Reversing/Plugging Travel Controller
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Type 4010 is a simple, easy-to-understand system with smooth, timed or frequency responsive acceleration and plugging control of wound rotor
motors used on travel motions for all types of cranes. The motor is started with all the rotor resistance in the circuit. Clapper contactors
in the controller short out the external rotor resistance in timed or frequency responsive steps, under control of a master switch, to provide
smooth and rapid acceleration. During reversing, a frequency sensitive plugging relay prevents all of the secondary resistor contactors from
closing until the motor is practically at rest. This keeps all of the external rotor resistance in the circuit during reversal to provide safe,
controlled stopping.
Type 4010 reversing-plugging control panels are suitable for use with ac wound rotor motors on crane bridge or trolley travel drives. These
panels can also be used on any reversing drive that is non-rectifier operated dc brakes.
Specifications:
Price List, 4000, April 2007
Specifications 4010, January 1984
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Type 4011 Dynamic Lowering Hoist Controller
Type 4011 AC Dynamic Lowering hoist controller provides braking action by applying a single-phase connection to the primary of a three-phase
wound rotor motor. It is recommended where slow lowering speeds are not required for overhauling loads of 50% or more and for hoists that do
not use mechanical or electric load brakes.
Five speed points are provided for hoisting. Lowering is controlled by three master switch points. In the first-point lowering, single-phase
power is applied to the motor primary with a dynamic braking connection. An overhauling load will lower at a speed depending on the load, but
a non-overhauling load will not lower. On second-point lower, weak down torque drives down non-overhauling loads and permits accurate inching
of light loads.
If the motor accelerator closes and drives the load down in regeneration. This prevents motor overspeeding with an overhauling load on the
hook. The third-point lowering accelerates the motor to full speed similar to full-speed hoisting.
Specifications:
Price List, 4000, April 2007
Specifications 4011, January 1984
Type 4012 Mechanical Load Brake Hoist Controller
Type 4012 is an effective hoist controller for applications where speeds can very with the load and frequent lowering is not required. Timing
devices or frequency responsive relays for accelerating contactors provide smooth acceleration control.
The first hoist position of the master switch provides low torque for taking up slack cable and hoisting light loads. Subsequent master switch
points allow additional contactors to close until the desired hoisting speed is attained. Movement of the master switch in the lowering
direction produces similar results. The load is driven downward against the retarding action of the mechanical load brake and timed or
frequency responsive accelerating relays provide smooth acceleration.
Type 4012 reversing control panels are suitable for use with a ac wound rotor motors on crane hoist drives.
Type 4012 controllers are for use on hoists that are equipped with a mechanical load brake or a means of providing control of overhauling loads.
These controllers provide good speed control hoisting and lowering, within the capability of the mechanical load brake.
Specifications:
Price List, 4000, April 2007
Specifications 4012, January 1984
Type 4013 Counter Torque Hoist Controller
Type 4013 counter torque hoist controller is recommended for applications such as bucket hoists, boom hoists and magnet cranes, where a fixed
minimum load exists which insures an overhauling condition at all times and where accurate positioning and slow steady speeds are not required.
The Counter Torque system uses reverse power to control speed in the lowering direction without the need for a load brake.
Control in the hoisting direction is the standard secondary resistor method with frequency responsive type acceleration. In the lowering
direction, the master switch is no effective until the third point. If the load is heavy enough, it will begin to lower. If the load is not
heavy enough, it will try to hoist, but a frequency sensing relay will prevent hoisting. The operator does not have to reset the control by
returning the master switch to the off point. Moving the master switch to the fifth-point lower will accelerate the motor to full speed under
control of the frequency responsive accelerating relays and drive the load down in regeneration. The operation in fourth-point lowering is the
same as described for the third point, except the load accelerates to a faster speed.
Specifications:
Price List, 4000, April 2007
Specifications 4013, January 1984
Type 4014 Electric Load Brake Hoist Controller
The Type 4014 controller relatively simple yet provides great precision in load handling. It is particularly useful for handling variable
loads at preselected subsynchronous speeds, and also provides slower and more stable lowering speeds than other ac stepped wound rotor hoist
motion controllers. Typical applications are in assembly or manufacturing operations where the crane is used frequently.
In this system the eddy current brake and the wound rotor motor are coupled directly to a common shaft. The brake serves as an artificial load
for the motor and develops braking torque by frictionless means; thus, lowering control is stable even at very slow speeds.
The controller acts as a plain reversing controller with five master switch points for hoisting and five for lowering. In hoisting, the eddy
current brake is energized in the first and second point hoist and de-energized in the last three points hoist. When energized during hoisting,
the brake artificially loads the motor thus causing light hook loads to be hoisted slowly. For lowering, the brake is energized on the first
four points lowering and de-energized on the fifth. When the brake is energized during lowering, its torque opposes the motor torque and
permits loads to be lowered slowly.
Type 4014 reversing control panels are suitable for use with ac wound rotor motors on crane hoist drives with eddy current brakes.
Specifications:
Price List, 4000, April 2007
Specifications 4014, February 2011
Type 4015 DC Dynamic Lowering Hoist Controller
The complete hoist control system consists of a power transformer, a silicon bridge rectifier and the hoist controller with accessories.
The power transformer is a totally enclosed, nonventilated (TENV), three-phase unit with delta connected primary and a three-phase wye-connected secondary.
The rectifier unit is a three-phase full wave bridge with diodes in parallel for redundancy. Rectifier protection is provided by fuses in each leg and
a surge suppressor and snubbing circuit on the dc side. Output of the rectifier is 300V dc.
The hoist controller is a standard dc dynamic lowering controller arranged for operation from 300V dc power. The controller components are
all front-mounted, front-removable, and front-wired.
Features:
All the advantages of a dc hoist controller on an ac crane:
Rugged dc series wound mill motor.
Reliable dc series wound brake.
Time-proven dc dynamic lowering hoist circuit.
High-speed hoisting and lowering of empty hook or light loads.
Slow, stable hook speeds hoisting and lowering with all loads.
Reliable dc dynamic lowering with motor connected as a generator and loaded with the dynamic braking resistor.
"Off-point" braking because of spring-closed dynamic braking contactor.
A hoist control system with rectifier output of 360V dc is available as an option. Such a system operates at higher speeds than the 300V dc
system, resulting in a reduced duty time of about 15%.
Specifications:
Specifications 4015, January 1984
Type 4016 Crane Protective Panel
Type 4016 crane protective panels provide overload and undervoltage protection for all motors on a crane where the individual control panels
are furnished "without protection".
The standard crane protective panel includes a 3 pole main line clapper contactors and overload relays for three motors. Overload relays
for additional motors can be added.
Suitable for all NEMA and CMAA service classes.
Specifications:
Price List, 4000, April 2007
Specifications 4016, January 1984
Type 4017 AC Hoist Controller with Compensated DC Dynamic Lowering
Type 4017 is a DC dynamic lowering hoist controller providing braking action by rectifying the voltage developed on the wound rotor motor
slip rings and connecting the DC voltage to a single phase of the three phase wound rotor motor primary windings. It is recommended for
hoists with a fixed minimum load and do not have a mechanical or eddy current brake, but require good speed regulation.
Control in hoisting is the standard secondary resistor method. In lowering 5 speed points are provided with the secondary slip voltage
rectified and connected to a single phase of the primary. The controller provides relatively float speed-torque curves similar to eddy
current brake hoist performance.
Suitable for all NEMA and CMAA service classes.
Specifications:
Price List, 4000, April 2007
Type 4019 Opotor (Opposite Torque) Hoist Control
The name Opotor is derived from "opposite torque" which describes the hoist controller system's operation that requires the
presence of an overhauling load on the hoisting mechanism. Lowering speed of the Hoist is controlled by the repetitive application and
removal of hoisting torque between two fixed levels. These levels are set by rotor resistance and adjusted by the opening and closing
of any one of four contactors in the motor's rotor circuit (1A, 2A, 3A, & 4A). Four selections of motor torque allow a speed band
spanning the range between an empty hook and a fully loaded hook, permitting only small changes in motor torque and producing smooth
speed control.
Specifications:
Specifications 4019, July 2009
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